So I moved into my apartment and I have a gnat infestation. I do not know where they are coming from THOUGH I do know that there is a swarm out side my door. I sprayed and it worked but they will come back. I poured boiling water down all the drain... I keep a bowl of vinegar and dish soap out....but nothing. I'm mean they do no harm they are just BUGGING me lol So I need some help